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Title: Two-plasmon decay mitigation in direct-drive inertial-confinement-fusion experiments using multilayer targets

Multilayer direct-drive inertial-confinement-fusion (ICF) targets are shown to significantly reduce two-plasmon-decay (TPD) driven hot-electron production while maintaining high hydrodynamic efficiency. Implosion experiments on the OMEGA Laser used targets with silicon layered between an inner beryllium and outer silicon-doped plastic ablator. A factor of five reduction in hot-electron generation (> 50 keV) was observed in the multilayer targets relative to pure CH targets. Three-dimensional simulations of the TPD driven hot-electron production using a laser-plasma interaction code (LPSE) that includes nonlinear and kinetic effects show excellent agreement with the measurements. As a result, the simulations suggest that the reduction in hot-electron production observed in the multilayer targets is primarily due to increased electron-ion collisional damping.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Univ. of Rochester, Rochester, NY (United States)
Publication Date:
Grant/Contract Number:
NA0001944
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Univ. of Rochester, Rochester, NY (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1255563
Alternate Identifier(s):
OSTI ID: 1247830

Follett, R. K., Delettrez, J. A., Edgell, D. H., Goncharov, V. N., Henchen, R. J., Katz, J., Michel, D. T., Myatt, J. F., Shaw, J., Solodov, A. A., Stoeckl, C., Yaakobi, B., and Froula, D. H.. Two-plasmon decay mitigation in direct-drive inertial-confinement-fusion experiments using multilayer targets. United States: N. p., Web. doi:10.1103/PhysRevLett.116.155002.
Follett, R. K., Delettrez, J. A., Edgell, D. H., Goncharov, V. N., Henchen, R. J., Katz, J., Michel, D. T., Myatt, J. F., Shaw, J., Solodov, A. A., Stoeckl, C., Yaakobi, B., & Froula, D. H.. Two-plasmon decay mitigation in direct-drive inertial-confinement-fusion experiments using multilayer targets. United States. doi:10.1103/PhysRevLett.116.155002.
Follett, R. K., Delettrez, J. A., Edgell, D. H., Goncharov, V. N., Henchen, R. J., Katz, J., Michel, D. T., Myatt, J. F., Shaw, J., Solodov, A. A., Stoeckl, C., Yaakobi, B., and Froula, D. H.. 2016. "Two-plasmon decay mitigation in direct-drive inertial-confinement-fusion experiments using multilayer targets". United States. doi:10.1103/PhysRevLett.116.155002. https://www.osti.gov/servlets/purl/1255563.
@article{osti_1255563,
title = {Two-plasmon decay mitigation in direct-drive inertial-confinement-fusion experiments using multilayer targets},
author = {Follett, R. K. and Delettrez, J. A. and Edgell, D. H. and Goncharov, V. N. and Henchen, R. J. and Katz, J. and Michel, D. T. and Myatt, J. F. and Shaw, J. and Solodov, A. A. and Stoeckl, C. and Yaakobi, B. and Froula, D. H.},
abstractNote = {Multilayer direct-drive inertial-confinement-fusion (ICF) targets are shown to significantly reduce two-plasmon-decay (TPD) driven hot-electron production while maintaining high hydrodynamic efficiency. Implosion experiments on the OMEGA Laser used targets with silicon layered between an inner beryllium and outer silicon-doped plastic ablator. A factor of five reduction in hot-electron generation (> 50 keV) was observed in the multilayer targets relative to pure CH targets. Three-dimensional simulations of the TPD driven hot-electron production using a laser-plasma interaction code (LPSE) that includes nonlinear and kinetic effects show excellent agreement with the measurements. As a result, the simulations suggest that the reduction in hot-electron production observed in the multilayer targets is primarily due to increased electron-ion collisional damping.},
doi = {10.1103/PhysRevLett.116.155002},
journal = {Physical Review Letters},
number = 15,
volume = 116,
place = {United States},
year = {2016},
month = {4}
}